MSM
Master Switch Fabric
Module. This Extreme Networks-proprietary name refers to the module that holds both the
control plane and the switch fabric for switches that run the ExtremeXOS software on modular
switches. One MSM is required for switch operation; adding an additional MSM increases
reliability and throughput. Each MSM has two CPUs. The MSM has LEDs as well as a console
port, management port, modem port, and compact flash; it may have data ports as well. The
MSM is responsible for upper-layer protocol processing and system management functions. When
you save the switch configuration, it is saved to all MSMs.
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